# RootCore OS 1.0 Release Notes

Release date: 2026-08-08

RootCore OS 1.0 is the first installable RootCore desktop ISO. It is based on Ubuntu 26.04 and keeps Ubuntu as the upstream package and security-update base.

## Highlights

- Branded RootCore live boot experience with custom Plymouth logo, mascot, watermark, and spinner animation.
- RootCore desktop branding, wallpaper defaults, MOTD, OS display name, and GNOME welcome logo.
- Offline Calamares installer configured for RootCore OS.
- RootCore installer autostarts only in the live session and is removed from the installed system.
- RootCore package set is built as local Debian packages and shipped in the ISO.
- Offline ISO APT repository is signed with a RootCore archive keyring instead of using `Trusted: yes`.
- Installed systems include `/etc/rootcore-release` and `/usr/share/rootcore/release.conf`.

## Included RootCore Packages

- `rootcore-branding`
- `rootcore-calamares-config`
- `rootcore-plymouth-theme`
- `rootcore-archive-keyring`
- `rootcore-archive-config`

## Known Scope

- Ubuntu remains the upstream package base.
- RootCore does not yet operate an online package mirror.
- RootCore packages are currently distributed through the offline ISO repository.

## Verification

The build should pass:

```bash
scripts/verify-build.sh
```

The installed system should report:

```bash
cat /etc/rootcore-release
cat /usr/lib/os-release
```